My example is completely unusable. It is so obviously unusable that I can't really review it; my scores are based ont he one I have.
Lesser cons: do they really need an 82mm thread? The front element looks pretty small in it and 20mm is not awfully wide in the scheme of things.

Agree totally with Bitty.

Testing shows focus is about 20mm short. Got it from Warehouse Express yesterday and it'll be going back for a swap. If the replacement is no better I'll have to get the Nikkor 18-200 VR.

Very disappointed as I have the Sigma 70-200 f2.8 which is excellent. I hope Sigma are not going the same way as Vivitar.